ICOM IC-703 Manual Icom Ic-703 Manual > > INSTRUCTION MANUAL > HF/50 MHz > ALL MODE TRANSCEIVER > > i703 > FOREWORD > Thank We understand that you have a choice of many > different radios in the market place. We want to take a > couple of moments of your time to thank you for making the IC-703 your radio of choice, and hope you > agree with Icom‚s philosophy of „technology first.‰ > Many hours of research and development went into > the design of your IC-703. > > FEATURES > > .DSP features (AF DSP; UT-106 DSP UNIT required > some version) > . All mode capability covering 160ˆ6 m > . 9.0ˆ15.87 V operation > . Compact with detachable front panel > . ±0.5 ppm of high frequency stability > . Built in antenna tuner > . Simple band scope function > PRECAUTION > IMPORTANT > READ THIS INSTRUCTION MANUAL > CAREFULLY before attempting to operate the > transceiver. > > SAVE THIS INSTRUCTION MANUAL. This > manual contains important safety and operating instructions for the IC-703. > > EXPLICIT DEFINITIONS > WORD DEFINITION > RWARNING > Personal injury, fire hazard or electric > shock may occur. > CAUTION Equipment damage may occur. > NOTE > If disregarded, inconvenience only. No > risk or personal injury, fire or electric > shock. > > RWARNING RF EXPOSURE! This device emits > Radio Frequency (RF) energy. Extreme caution should be > observed when operating this device. If you have any > questions regarding RF exposure and safety standards > please refer to the Federal Communications Commission > Office of Engineering and Technology‚s report on Evaluating Compliance with FCC Guidelines for Human Radio > Frequency Electromagnetic Fields (OET Bulletin 65). > > RWARNING HIGH VOLTAGE! NEVER attach an > antenna or internal antenna connector during transmission. This may result in an electrical shock or burn. > > RNEVER apply AC to the [DC13.8V] receptacle on the > transceiver rear panel. This could cause a fire or damage > the transceiver. > > RNEVER apply more than 16 V DC, such as a 24 V > battery, to the [DC13.8V] receptacle on the transceiver > rear panel. This could cause a fire or damage the transceiver. > > RNEVER let metal, wire or other objects touch any internal part or connectors on the rear panel of the transceiver. This may result in an electric shock. > > > NEVER expose the transceiver to rain, snow or any liquids. > > AVOID using or placing the transceiver in areas with temperatures below ˆ10°C (+14°F) or above +60°C (+140°F). > Be aware that temperatures on a vehicle‚s dashboard can > exceed 80°C (+176°F), resulting in permanent damage to > the transceiver if left there for extended periods. > > AVOID placing the transceiver in excessively dusty environments or in direct sunlight. > > AVOID placing the transceiver against walls or putting > anything on top of the transceiver. This will obstruct heat > dissipation. > > Place unit in a secure place to avoid inadvertent use by > children. > > During mobile operation, DO NOT operate the transceiver > without running the vehicle‚s engine. When the transceiver‚s power is ON and your vehicle‚s engine is OFF, > the vehicle‚s battery will soon become exhausted. > > Make sure the transceiver power is OFF before starting > the vehicle. This will avoid possible damage to the transceiver by ignition voltage spikes. > > During maritime mobile operation, keep the transceiver > and microphone as far away as possible from the magnetic > navigation compass to prevent erroneous indications. > > BE CAREFUL! The rear panel will become hot when operating the transceiver continuously for long periods. > > BE CAREFUL! If a linear amplifier is connected, set the > transceiver‚s RF output power to less than the linear amplifier‚s maximum input level, otherwise, the linear amplifier will be damaged. > > Use Icom microphones only (supplied or optional). Other > manufacturer‚s microphones have different pin assignments, and connection to the IC-703 may damage the > transceiver. > > Beat signals may be heard on some frequencies. > These will occur as a result of circuit construction. > > For U.S.A. only > > Caution: Changes or modifications to this transceiver, not > expressly approved by Icom Inc., could void your authority > to operate this transceiver under FCC regulations. > FOREWORD ????????????????? i > IMPORTANT ?????????????????i > EXPLICIT DEFINITIONS ???????????? i > PRECAUTION ????????????????i > TABLE OF CONTENTS ???????????? ii > > QUICK REFERENCE GUIDE ??????IˆX > > Installation ???????????????? I > 1. Grounding your Shack ????????? I > 2. Installing your DC Power Supply ???? I > 3. Installing lightning protection ?????? II > 4. Installing your antenna system ????? II > 5. Connect other peripheral equipment ?? III > Operation ???????????????? III > 1. Voice ???????????????? III > 2. CW????????????????? III > 3. Other convenient items ???????? IV > Your first contact ????????????? IV > D Getting started ????????????? IV > D Just listening ?????????????? V > 1. Select the desired band ???????? V > 2. Tune to the desired frequency ????? V > 3. Adjust audio output ?????????? V > D What are you hearing? ????????? VI > 1. Verify mode ????????????? VI > 2. Reducing interference > (Some functions may require > an optioanl unit depending on version) ? VI > Ready to call CQ? ???????????? IX > 1. Setting up your Mic Gain ??????? IX > 2. Speech compressor?????????? X > TABLE OF CONTENTS > 1 PANEL DESCRIPTION ???????1ˆ10 > > Front panel ???????????????? 1 > Multi-function switches ??????????? 4 > DM1 functions ?????????????? 4 > DM2 functions ?????????????? 4 > DM3 functions ?????????????? 4 > DM4 functions ?????????????? 5 > DS1 functions ?????????????? 6 > DS2 functions ?????????????? 6 > DS3 functions ?????????????? 6 > DS4 functions > > (UT-106 is required for some version) ??? 6 > > Rear panel ???????????????? 7 > DDATA socket ?????????????? 8 > DACC socket??????????????? 8 > Function display?????????????? 9 > Microphone (HM-103) ?????????? 10 > 2 INSTALLATION AND CONNECTIONS ? 11ˆ16 > > Unpacking???????????????? 11 > Selecting a location???????????? 11 > Grounding???????????????? 11 > Antennaconnection???????????? 11 > Installation ??????????????? 12 > DSingle body mounting ?????????? 12 > DStand ????????????????? 12 > DFront panel separation ????????? 12 > DFront panel mounting ?????????? 12 > Required connections??????????? 13 > Advanced connections ?????????? 14 > DC Power voltage ???????????? 15 > DC Power supply connections ??????? 15 > Battery connections ??????????? 15 > External antenna tuners and linear amplifier ? 16 > SUPPLIED ACCESSORIES > The transceiver comes with the following accessories. > Qty. > q Hand microphone (HM-103) ………………………… 1 > w DC power cable (OPC-1229) ……………………….. 1 > e Spare fuse (FGB 4 A) …………………………………. 3 > r ACC cable …………………………………………………..1 > t 3.5 (d) mm plug ……………………………………………1 > y 6.5 (d) mm Electronic keyer plug…………………….1 > u Microphone hanger……………………………………….1 > q > e r > w > t y u > 1 > 2 > 3 > 4 > 5 > 6 > 7 > 8 > 9 > 10 > 11 > 12 > 13 > 14 > 15 > 16 > 17 > 18 > 19 > Quick Reference > Icom, Icom Inc. and the > logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. > > > TABLE OF CONTENTS > 3 BASIC OPERATION ????????17ˆ26 > > When first applying power (CPU resetting)?? 17 > DM1 display selection ?????????? 17 > > Initial settings ?????????????? 17 > > VFO description ????????????? 18 > DThe differences between VFO and > memory mode ????????????? 18 > > Frequency setting ???????????? 19 > > Operating mode selection ????????? 23 > > Volume setting?????????????? 23 > > Squelch and receive (RF) sensitivity ???? 24 > > Dial lock function????????????? 25 > > Basic transmit operation ????????? 25 > DTransmitting ?????????????? 25 > DMaximum output power ????????? 25 > DSetting output power ?????????? 26 > DSetting microphone gain????????? 26 > > 4 RECEIVE AND TRANSMIT ?????27ˆ45 > > Operating SSB?????????????? 27 > DConvenient functions for receive ????? 27 > DConvenient functions for transmit ????? 27 > > Operating CW ?????????????? 28 > DConnections for CW ?????????? 28 > DCW operation ????????????? 29 > DConvenient functions for receive ????? 30 > DConvenient functions for transmit ????? 30 > DCW reverse mode ??????????? 30 > DCW pitch control ???????????? 31 > DElectronic CW keyer ?????????? 31 > DCW side tone function?????????? 32 > DKeyer set mode ???????????? 32 > > Memory keyer functions?????????? 33 > DMemory keyer send menu ???????? 34 > DEditing a memory keyer ????????? 35 > DContest number set mode ???????? 36 > DMemory keyer set mode????????? 37 > > Operating RTTY ????????????? 38 > DConnections for RTTY (FSK)??????? 38 > DRTTY (FSK) operation ????????? 38 > DConvenient functions for receive ????? 39 > DRTTY reverse mode ?????????? 39 > DPresetting for RTTY ?????????? 40 > DRTTY tone set mode ?????????? 40 > > Operating AM ?????????????? 41 > DConvenient functions for receive ????? 41 > DConvenient functions for transmit ????? 41 > > Operating FM ?????????????? 42 > DConvenient functions for receive ????? 42 > DConvenient functions for transmit ????? 42 > DTone squelch operation ????????? 43 > DTone scan operation ?????????? 43 > DFM tone set mode ??????????? 44 > > Repeater operation???????????? 45 > > 5 FUNCTION FOR RECEIVE ?????46ˆ50 > > Simple band scope ???????????? 46 > > Preamp and attenuator ?????????? 46 > > RIT function ??????????????? 47 > > IF shift function ????????????? 47 > > Noise blanker ?????????????? 48 > DNoise blanker level set mode ?????? 48 > > AGC time constant ???????????? 48 > > Optional filter selection ?????????? 49 > > Peak meter hold ????????????? 50 > > DSP Functions (may require an optional unit > depending on version) ?????????? 50 > DANF (Automatic Notch Filter) function ??? 50 > DNR (Noise Reduction) function ?????? 50 > > 6 FUNCTION FOR TRANSMIT ?????51ˆ55 > > Split frequency operation ????????? 51 > DQuick split function ??????????? 52 > > Meter selection ????????????? 52 > > VOX operation?????????????? 53 > DVOX set mode ????????????? 53 > > Speech compressor ??????????? 54 > DCompression level set mode ??????? 54 > > SWR??????????????????? 55 > DMeasuring SWR ???????????? 55 > > 7 MEMORY OPERATION ???????56ˆ60 > > Memory channels ???????????? 56 > > Memory channel selection????????? 56 > > Memory programming ?????????? 57 > > Memory clearing ????????????? 58 > > Frequency transferring ?????????? 58 > > Memory names ????????????? 59 > > Memo pads ??????????????? 60 > > 8 SCAN OPERATION ????????61ˆ63 > > Scan types ??????????????? 61 > > Preparation ??????????????? 61 > > Programmed scan operation???????? 62 > > Memory scan operation ?????????? 62 > > Select memory scan operation ??????? 63 > > Priority watch ?????????????? 63 > > 9 ANTENNA TUNER OPERATION??? 64ˆ66 > > Antenna tuner operation ????????? 64 > DInternal antenna tuner?????????? 64 > DTuner operation ???????????? 64 > DOptional external tuner operation ????? 65 > DOptional AT-180 > AUTOMATIC ANTENNA TUNER operation ??? 65 > DOptional AH-4 > AUTOMATIC ANTENNA TUNER operation ??? 66 > TABLE OF CONTENTS > 10 DATA COMMUNICATION ????? 67ˆ70 > > Connections for packet ?????????? 67 > DWhen connecting to [DATA] socket ???? 67 > DWhen connecting to [ACC] socket ???? 67 > DWhen connecting to [MIC] connector ??? 67 > Packet (AFSK) operation ????????? 68 > DFrequency indication during AFSK operation ? 68 > DSSB-D mode selection ????????? 69 > DCarrier point setting??????????? 69 > DAdjusting the transmit signal from the TNC? 70 > 11 CONTROL COMMAND ?????? 71ˆ73 > > Remote jack (CI-V) information ?????? 71 > DCI-V connection example ????????? 71 > DData format ??????????????? 71 > DCommand table ???????????? 72 > D Band stacking register ????????? 73 > D Codes for memory keyer contents ???? 73 > D Codes for memory name contents ???? 73 > 12 SET MODE ??????????? 74ˆ82 > > General????????????????? 74 > DQuick set mode operation ???????? 74 > DInitial set mode operation ???????? 74 > Quick set mode items??????????? 75 > Initial set mode items ??????????? 76 > 1 Maximum output power setting ???? 76 > 2 Power save setting ????????? 76 > 3 Simple mode setting????????? 76 > 4 Mode availability ?????????? 76 > 5 Output power setting for mode ???? 76 > 6 Confirmation beeps ????????? 77 > 7 Band edges beeps ????????? 77 > 8 Beep level adjustment ???????? 77 > 9 Beep audio level limit ???????? 77 > 10 CW carrier point setting ??????? 77 > 11 CW side tone level ????????? 77 > 12 CW side tone level limit ??????? 77 > 13 SSB/CW frequency shift setting ???? 78 > 14 Display backlighting ????????? 78 > 15 Key/switch backlighting ??????? 78 > 16 Light timer setting ?????????? 78 > 17 LED brightness ??????????? 78 > 18 Automatic power OFF ???????? 78 > 19 Current intercept point ???????? 79 > 20 RF gain/squelch control ??????? 79 > 21 Sub dial setting ??????????? 79 > 22 Optional filter selection???????? 79 > 23 Peak meter hold setting ??????? 79 > 24 Quick split function ????????? 79 > 25 Split lock function ?????????? 80 > 26 Split offset frequency ???????? 80 > 27 Scan resume condition???????? 80 > 28 Scanning speed??????????? 80 > > 29 [UP]/[DN] speed ?????????? 80 > 30 Noise blanker in AM mode ?????? 80 > 31 Available memo pads ???????? 80 > 32 Power ON check function ?????? 81 > 33 Auto tune start function ??????? 81 > 34 PTT tune function ?????????? 81 > 35 Tuner switch condition ???????? 81 > 36 Packet data speed ????????? 81 > 37 Voice synthesizer language?????? 82 > 38 Voice synthesizer speed ??????? 82 > 39 S-meter level speech ???????? 82 > 40 CI-V address setting????????? 82 > 41 CI-V data transffer rate???????? 82 > 42 CI-V transceive ??????????? 82 > 43 CI-V operating frequency data length ? 82 > > 13 MAINTENANCE ??????????? 83 > > Fuse replacement ???????????? 83 > Memory backup ????????????? 83 > Cleaning ???????????????? 83 > 14 TROUBLESHOOTING??????? 84ˆ85 > > 15 OPTIONAL UNIT > INSTALLATIONS AND SETTINGS ?86ˆ89 > > Opening the transceiver case ??????? 86 > UT-102 VOICE SYNTHESIZER UNIT ?????? 86 > DOperation ??????????????? 86 > IF filter ????????????????? 87 > UT-106 DSP RECEIVER UNIT ???????? 88 > MB-72 CARRYING HANDLE ????????? 88 > AT-180 internal switch description ????? 89 > 16 SPECIFICATIONS ??????????90 > > General????????????????? 90 > Transmitter ??????????????? 90 > Receiver ???????????????? 90 > Antenna tuner ?????????????? 90 > 17 OPTIONS ????????????91ˆ92 > > 18 MENU GUIDE ??????????93ˆ94 > > 19 ABOUT CE???????????? 95ˆ96 > > 1 > 2 > 3 > 4 > 5 > 6 > 7 > 8 > 9 > 10 > 11 > 12 > 13 > 14 > 15 > 16 > 17 > 18 > 19 > Quick Reference > > QUICK REFERENCE GUIDE > Installation > 1. Install a ground system for DC noise suppression > and RFI suppression > 2. Install your DC power supply > 3. Install lightning protection. This will help protect > more than your gear. > 1. Grounding your Shack > 2. Installing your DC Power Supply > 4. Install and connect an antenna system for the appropriate bands of operation > 5. Connect other peripheral equipment. This includes > microphones, headsets, TNC, amplifiers and any > other equipment necessary to make your shack > complete. > Although your radio will operate by connecting the DC > power supply and antenna, it is necessary to have a > good ground system in your shack. A ground connec- > tion is the electrical contact between the common > point of an electrical or electronic system and the > earth. > A good earth ground is necessary to prevent electrical > shock, eliminate problems from RFI and DC noise. > With more electronic devices being used today, it is > also important to reduce RFI and EMI. Although you > may not see interference in your shack, without a > grounding system, your neighbours may experience > interference. Even though many of these devices are > Part 15, where they must accept interference from > their surrounding environment, it is best to eliminate > as much of the possible interference from your shack. > If you do not have a grounding system for your shack, > depending on the location of your shack, basement or > ground floor, a good ground system can be as simple > as a couple of ground rods driven 6 to 8 feet into the > soil. When installing your IC-703 to your grounding > system, the shortest most direct connection is recom- > mended. > NOTE: There are many publications covering > proper grounding techniques. Check with your local > dealer for more information and recommendations. > RWARNING!: NEVER ground station equip- > ment or antennas to house gas lines. NEVER at- > tach ground lines to plastic (pvc) pipe. > DDSome Symptoms if inadequate grounding > a. Poor DC Ground > 50/60 Hz hum on the audio either Rx or Tx without > the antenna connected. > If you feel a tingling sensation when you touch a > metal surface. Surfaces such as the cover of your > radio or power supply. > b. Poor RF Ground > While transmitting and you feel a tingling sensation > when you touch a metal surface. Surfaces such as > the cover of your radio or power supply. > While transmitting, you experience interference to > other electronic devices, such as the telephone, > television or stereo audio systems. > The DC power supply is a device used to convert > 110/220 V AC, also know as Household current, to a > steady source of 13.8 V DC. > The perfect match to your IC-703 is the PS-125. This > plug and play unit plugs into the DC power recepta- > cle using an optional OPC-1248 located on the rear > of the radio. > Or connect the supplied DC power cable (OPC-1229) > to the appropriate color coded terminals, then insert > the DC connector into the DC power receptacle lo- > cated on the rear of the radio. > NOTE: Although the power supply current require- > ment is quite low during receiving, this not the case > when you transmit. With many electrical devices in > the shack, it is very important to verify the electrical > circuit is not overloaded. > AC cable > AC > outlet > A DC power > supply* > Black > _ > Red > + > PS-125 > DC power cable > Ground > 4 A fuses > Transceiver > to DC > power > receptacle > Supplied > OPC-1229Optional > OPC-1248 > Connect to an AC outlet > using the supplied AC cable. > *13.8 V; > at least 3.0 A > continuous > > QUICK REFERENCE GUIDE > > 3. Installing lightning protection > Although you may not live in an area with high occur- > NOTE: There are many publications covering > rence for lightning storms, it is always wise to take > > proper lightning protection, check with your local > precautions for lightning or static discharges. Proper > > dealer for more information and recommendations. > lightning protection not only offers protection to the > ham gear, but the shack and most importantly the operator. > > 4. Installing your antenna system > Whether your IC-703 is your first radio or one of > many, one of your key elements in a great shack is > the antenna system. There is a connection on the > back of your IC-703, for HF and 6 m. If you are using > one antenna for HF and 6 m, for simplicity, connect > the antenna coax to ANT. > Your IC-703 is equipped with an internal antenna > tuner (ATU) for operation on 160ˆ6 m. This ATU is de- > signed to work with an unbalanced 50 O feedline. The > purpose of the internal antenna tuner is to match the > impedance of your antenna system to as close to a > 50 O load as possible. This ATU will not operate with > a long wire or ladder line (450 O or other balanced > feedlines). An external ATU such as the AH-4 would > be necessary for this kind of operation. > PL-259 CONNECTOR INSTALLATION EXAMPLE > 30 mm ? 9/8 in 10 mm ? 3/8 in 1ˆ2 mm ? 1/16 in > RWARNING: Although a mag mount antenna > works great on a vehicle, DO NOT use the IC-703 > with this type of antenna. > CAUTION: Although your IC-703 has protection to > drop down power with a high SWR, this does not > completely protect the transceiver from transmis- > sion without an antenna. Make sure you have an > antenna connected whenever you transmit with > your radio. > NOTE: There are many publications covering > proper antennas and their installation, check with > your local dealer for more information and recom- > mendations. > 30 mm > 10 mm (soft solder) > 10 mm > 1ˆ2 mm > solder solder > Soft > solder > Coupling ring > Slide the coupling ring > down. Strip the cable > jacket and soft solder. > Slide the connector > body on and solder it. > Screw the coupling > ring onto the > connector body. > Strip the cable as > shown at left. Soft > solder the center con- > ductor. > q > w > e > r > Antenna SWR > Each antenna is tuned for a specified frequency > range and SWR may be increased out-of-range. > When the SWR is higher than approx. 2.0:1, the > transceiver‚s power drops to protect the final tran- > sistors. In this case, an antenna tuner is useful to > match the transceiver and antenna. Low SWR al- > lows full power for transmitting even when using the > antenna tuner. The IC-703 has an SWR meter to > monitor the antenna SWR continuously. > ANTENNA > Connect a HF/50MHz antenna > Impedance: 50O > Quick Reference > > QUICK REFERENCE GUIDE > > 5. Connect other peripheral equipment > Everyone has his or her favorite ad-on gear; now is If you do not see the particular item you are wanting > the time to connect this gear! We will cover the basic to connect, refer to the Advance Connections section > devices that can be connected to your IC-703. starting on page 14. > > Operation > 1. Voice > Microphones: Connect the microphone to the modu- > lar-type connector bottom of the front panel or back > of the radio. > Rear panel > Front panel > MICROPHONES > HM-103 SM-20 OPC-589 > 2. CW > CW Key: There are several types of keys or keyers > that can be used with your IC-703. > a. Iambic Key paddle: Use a 6.35(d) mm (1/4.) stereo > plug and connect to the [KEY] jack located on the > rear of the radio. > b. Straight Key: Use a 6.35(d) mm (1/4.) mono plug > and connect key to the back of the radio. > c. External Keyer: Use a 6.35(d) mm (1/4.) mono > plug and connect to the back of the radio. > d. Computer Keying: Use a 6.35(d) mm (1/4.) mono > plug and connect to the back of the radio. > NOTE: You will need to select the type of keyer you > are using in the keyer set mode. There are many > advanced CW functions in this set mode. Until you > have a full understanding of these functions > change only the items necessary. > Rear panel > CW KEY > A straight key can be used when the internal > electronic keyer is turned OFF in keyer set > mode. (p. 32) > When connecting a straight key or else > (+) > (_) > Rear panel > CW KEY > (dot) > (com) > (dash) > When connecting a paddle > > QUICK REFERENCE GUIDE > 3. Other convenient items > Headphones: > A 3.5(d) mm (1/4.) mono jack for operation without > using the internal or external speakers. Perfect for op- > eration without disturbing others in the room. > External Speaker: > A 3.5(d) mm (1/8.) mono jack for operation with an ex- > ternal speaker. (Input impedance: 8 O/Max. input > power: 5 W) > Front panel > Rear panel > SPEAKER > or > PHONES . > SPEAKER v > Select ŒSPEAKER‚ with > the [PHONES/SPEAKER] > switch on the back of the > front panel. > SPEAKER > Front panel > HEADPHONES > PHONES . > SPEAKER v > Select ŒPHONES‚ with the > [PHONES/SPEAKER] > switch on the back of the > front panel. > Your first contact > Now you should have your IC-703 installed in your > shack, and like a kid on his birthday, you are probably > excited to get on the air. We would like to take you > through a few basic operation steps to make your first > „On The Air‰ an enjoyable experience. > > D Getting started > > 1. Before powering up your radio, you may want to 2. Resetting the CPU: Although you have purchased > make sure the following controls are set in the fol-a brand new radio, some settings may be changed > lowing positions: from the factory defaults during the QC process. So > your radio can start from Factory Defaults resetting > the CPU is necessary. (Refer to p.17) > > [POWER] > > [Y] > ?[AF] : Commonly referred to as the vol > [Z] > ume: fully counter clockwise. > > ?[RF/SQL] : The control for the RF Gain and > Squelch circuits: 12 o‚clock. > ?[SHIFT] : Shifts the IF center frequency: > 12 o‚clock > Quick Reference > > QUICK REFERENCE GUIDE > > D Just listening > > 1. Select the desired band > On your IC-703, an easy way of changing bands is by > using the [(Y)BAND] or [(Z)BAND] located just right > corner on the front panel. > Push [(Y)BAND] or [(Z)BAND] to select the desired > band. > ?Pushing [(Y)BAND] or [(Z)BAND] continuously scrolls > through the available bands. > Say you want to go to 20 meters or 14 MHz; you > would push [(Y)BAND] or [(Z)BAND] several times > to select it. This will change the displayed operating > frequency to the 20-meter band. > NOTE: The band stacking register can also be > used to select bands. (Refer to p. 22) > > ?[Y] > [Z] > 2. Tune to the desired frequency > Directly left of the [(Y)BAND]/[(Z)BAND] is the main > dial. This will allow you to dial in the frequency you > want to operate. You will notice the tuning speed [TS] > is 10 Hz resolution. Page 20 will instruct you on how > to set the tuning speed [TS] for 1 Hz resolution. > 3. Adjust audio output > Adjust this control to a comfortable audio level. > > AF > RF/SQL > Decreases > Increases > No audio output > Max. audio output > > QUICK REFERENCE GUIDE > > D What are you hearing? > > Stop and focus on what you are hearing. Do you hear > a lot of noise? Is the signal intelligible? Are you set up > for the right mode? How about the filters? > > 1. Verify mode > Although your IC-703 will automatically select USB or > > MODE > > LSB in the HF bands, it will not select any of the other > modes. You will need to select the proper mode > whether CW, RTTY, AM or FM. > Hint! > > The Band Stacking Register will memorize the last > frequency used in the band, as well as the Mode, > Filter, Tuner and AGC settings. This makes band > hoping much easier. > > 2. Reducing interference (some functions may require an optional unit depending on version) > Your IC-703 has many features to reduce QRM and > QRN from the desired signal. > a. Noise Reduction: The noise reduction system on > your IC-703 is part of the DSP. This is used to re- > duce the hiss and QRM levels. > qSelect S4 (DSP menu). > ?Push [DISPLAY] once or twice to select S. > ?Push [MENU] one or more times to select S4. > wPush [(F-2)NR] to activate the noise reduction func- > tion. > ? „DSP‰ and „NR‰ appear when the function is ON. > b. Adjusting the Noise Reduction: The noise re- > duction is completely variable on how much of the > DSP Noise Reduction is used. > qPush [(F-3)NRL] to indicate the noise reduction > level. > wRotate the [M-CH] control to set the noise reduc- > tion level. > ePush [(F-3)NRL] to exit the noise reduction level > set mode. > Hint! > How far you advance the NR control will determine > how much the noise can be effectively reduced. Ad- > justing the noise reduction level too high may cause > some distortion to occur on the received signal. The > noise reduction level should only be set as high as > is necessary. Use this setting, along with RF gain, > NB (noise blanker, if needed), and IF filters as well, > to minimize the effects of noise on the target signal. > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > S4 LEVEL 4 NRL > NRNRDSP > [(F-3)][M-CH] > Noise reduction ON > Noise reduction OFF > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > S4 ANF NR NRL > NRNRDSP > [(F-2)][MENU] [DISPLAY] > Appear > Quick Reference > > QUICK REFERENCE GUIDE > c. Automatic Notch: The automatic notch will track > up to heterodynes. This is helpful for eliminating > annoying transmitter „tune up‰ tones on any band, > and to minimize continuous tone „heterodynes‰ en- > countered on the 40 meter phone bands at night, > for example. Once selected an icon will appear > „ANF‰ on the display. > qSelect S4. > ?Push [DISPLAY] once or twice to select S. > ?Push [MENU] one or more times to select S4. > wPush [(F-1)ANF] to activate the automatic notch fil- > ter. > NOTE: Your IC-703 is equipped with an AGC cir- > cuit. This allows the DSP to filter out interfering sig- > nals and QRM, while also taking this interference > out of the AGC. Bottom line, this will either elimi- > nate or greatly reduce the pumping of the AGC > from the interfering signal. > Hint! > The Automatic Notch will not operate in the CW, > RTTY or SSB-D modes. > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > S4 ANF NR NRL > ANFANFDSP > Appear > [(F-1)] > [DISPLAY][MENU] > d. Noise Blanker: The noise blanker function re- > duces pulse-type noise such as that generated by > automobile ignition systems. This function is not ef- > fective for FM modes or for non pulse-type noise. > qSelect M3. > ?Push [DISPLAY] once or twice to select M. > ?Push [MENU] one or more times to select M3. > wPush [(F-2)NB] to activate the noise blanker. > ?„NB‰ appears when the function is ON. > e. Adjusting the Noise Blanker: The noise blanker > is completely variable on how much of the Noise > Blanker is used. > qPush [(F-2)NB] for 1 sec. to enter the noise blanker > level set mode. > wRotate the main dial to set the noise blanker level. > ePush [DISPLAY] to exit the noise blanker level set > mode. > Hint! > When using the noise blanker, received signals > may be distorted if the noise blanker level setting > has been too high. > USB > N1 NB LEVEL > [(F-2)] Main dial > [DISPLAY] > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > M3 FIL NB MET > NB > [(F-2)][MENU] [DISPLAY] > Appears > > QUICK REFERENCE GUIDE > f. Filter: > One optional filter can be installed in the IC-703. > Narrow filters help reject interference from adjacent > signals and obtain good selectivity. > Wide filters provide improved audio for SSB opera- > tion when no interfering signals are present. > Narrow filters for AM/FM modes are standard. > FILTER PRESETTING: > After you install a filter (see p. 87 for installation), you > must specify the installed filter in initial set mode (item > „22 OPT. FIL‰ ; see p. 79). > FILTER ON/OFF: > qSelect M3. > ?Push [DISPLAY] once or twice to select M. > ? Push [MENU] one or more times to select M3. > wPush [(F-1)FIL] momentarily to select the narrow > filter; push for 1 sec. to select the wide filter. > ?ã appears when the narrow filter is selected; ç ap- > pears when the wide filter is selected. > NOTE:When selecting the narrow filter (or wide fil- > ter), the graphic passband is changed (see dia- > gram below). > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > M3 FIL NB MET > N W > [(F-1)] > [MENU] [DISPLAY] > Either these > appears when selected > Normal > operation > wide is > selected > narrow is > selected > We hope these pointers have been helpful. Now you > are ready for the „Ready to call CQ?‰. > > Quick Reference > > QUICK REFERENCE GUIDE > Ready to call CQ? > BAND > BAND > MODE > TS > DISPLAY > LOCK > F 1 F 2 F 3 > AF RF SQL > RIT > SHIFTM-CH > SUB > PHONES > TUNER > P.AMP ATT > Y > Z > POWER > MENU > TX > RX > [AF]: Max. CCW > [RF/SQL]: Center > [LOCK]: OFF > (indicator light out) > [POWER]: OFF > [SHIFT]: Center > [P.AMP/ATT]: OFF > (indicator lights out) > [TUNER]: OFF > (indicator lights out) > [RIT/SUB]: OFF > (indicator lights out) > CCW : counterclockwise > 1. Setting up your Mic Gain > Microphone gain must be adjusted properly so that > your signal does not distort when transmitted. > > qSelect SSB or another phone mode (AM or FM > > mode). > wPush [DISPLAY] for 1 sec. to select quick set mode. > ePush [MENU] one or more times to select „Q2 > > MIC GAIN.‰ > > ?The ALC meter is selected automatically when operat > ing in SSB mode. > rWhile speaking into the microphone, rotate the > > main dial to adjust the microphone gain so that the > > ALC meter does not peak past the ALC zone. > > ?While transmitting at your normal voice level, the ALC > meter should read at about the middle of the ALC zone. > ?Be sure the mic gain is in the range of 2 to 5. > tPush [DISPLAY] to exit quick set mode. > [MENU] Main dial > [DISPLAY] > ALC > S1 53 7 9 20 40 60dB > USB > Q2 MIC GAIN > ALC > ALC zone > QUICK REFERENCE GUIDE > > 2. Speech compressor > The IC-703 has a built-in, low distortion speech com- > pressor circuit. This circuit increases your average > talk power in SSB mode and is especially useful for > DX‚ing when the receiving station is having difficulty > copying your signal. > qSelect USB or LSB mode. > wSelect the ALC meter. > ? Push [DISPLAY] once or twice to select M. > ?Push [MENU] one or more times to select M3, then push > [(F-3)MET] one or more times to select „ALC.‰ > eSelect M4. > ?Push [MENU] one more time to select M4. > rPush [(F-2)COM] to turn the speech compressor > function ON. > ? „COM‰ appears. > tPush [(F-2)COM] for 1 sec. to enter the compres- > sion level set mode (p. 54). > yRotate the main dial to set the speech compression > level. > NOTE: When the ALC meter peaks at light the ALC > zone, your transmitted voice may be distorted. Hint! > Voice patterns and audio characteristics vary with > each operator, therefore the Microphone gain, > speech compression settings will be different for > each operator. Actual on air experimenting is nec- > essary to get just the right sound. It‚s best to test > and adjust your audio on the air, while someone > who knows what your real voice sounds like listens, > and provides and opinion on your audio quality. > ALC > ALC zone > ALC > S1 53 7 9 20 40 60dB > USB > C1 COMP LEVEL > [MENU] [(F-2)] > [(F-3)] > Main dial[DISPLAY] > Verify you have selected a clear frequency > and call out your CQ! > > Quick Reference > > 1 PANEL DESCRIPTION > Front panel > q > > we r > > qPOWER SWITCH [POWER] (p. 17) ?When setting as RF gain/squelch control > BAND > BAND > MODE > TS > DISPLAY > LOCK > F 1 F 2 F 3 > AF RF SQL > RIT > SHIFTM-CH > SUB > PHONES > TUNER > P.AMP ATT > Y > Z > POWER > MENU > TX > RX > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > M1 SPL A/B XFC > !1 > !2!3!4!5!6!7!8 > !9 > @0 > @2 > @1 > !0 > t > > Squelch is > open. > > RF gain > adjustable > range > > yui o > > Noise squelch (FM mode) > > Recommended level > > Maximum > RF gain > > S-meter > squelch > > .While transceiver‚s power is OFF: > Push to turn power ON. > ?Turn the DC power supply ON in advance. > .While transceiver‚s power is ON: > . Push momentarily to indicate the connected > power supply voltage. > . Push for 1 sec. to turn power OFF. > wAF GAIN CONTROL [AF] (inner control; p. 17) > Varies the audio output level from the speaker. > > AF > RF/SQL > Decreases > > Increases > > No audio output Max. audio output > > eRF GAIN CONTROL/SQUELCH CONTROL > [RF/SQL] (outer control; p. 24) > > Adjusts the RF gain and squelch threshold level. > The squelch removes noise output from the speaker > (closed condition) when no signal is received. > > ?The squelch is particularly effective for FM. It is also > available for other modes. > ?12 to 13 o‚clock position is recommended for any setting > of the [RF/SQL] control. > ?The control can be set as ŒAuto‚ (RF gain control in SSB, > CW and RTTY; squelch control in AM and FM) or > squelch control (RF gain is fixed at maximum) in initial > set mode as follows. (p. 79) > ?When functioning as RF gain control > (Squelch is fixed open; SSB, CW, RTTY only) > > Maximum > RF gain > > Adjustable > > range > > Minimum RF gain > > ?When functioning as squelch control > (RF gain is fixed at maximum.) > > Noise squelch Noise squelch (FM mode) > > threshold > (FM mode) > > Squelch is > open. > > Shallow > > S-meter squelch > threshold > > S-meter > squelch > > Deep > > MODE > SET MODE SETTING > AUTO SQL RF GAIN + SQL > SSB, CW > RTTY RF GAIN SQL RF GAIN + SQL > AM, FM SQL SQL RF GAIN + SQL > PANEL DESCRIPTION > > 1 > > rFUNCTION DISPLAY > Shows the operating frequency, dot matrix indications, selected memory channel, etc. See p. 9 for > details. > > tTUNING STEP SWITCH [TS] (pgs. 19ˆ21) > > .While in SSB/CW/RTTY modes, push momentarily to turn the programmable tuning step ON and > OFF. While in FM/AM mode push momentarily to > toggle the programmable tuning step and 1 MHz > quick tuning step. > ?While the programmable tuning step indicator is displayed, the frequency can be changed in programmed > kHz steps. > Programmable tuning step indicator > > USB > ?0.01 (FM/AM mode only), 0.1, 1, 5, 9, 10, 12.5, 20, 25 > and 100 kHz tuning steps are available. > ?1 MHz quick tuning step are only available in FM and > AM modes. > .While the programmable tuning step is OFF, turns > the 1 Hz step ON and OFF when pushed for 1 > sec. > ?1 and 10 Hz steps are only available in SSB, CW and > RTTY modes. > ?1 Hz indication appears, and the frequency can be > changed in 1 Hz steps. > .While the programmable tuning step is ON, enters the tuning step selection mode when pushed > for 1 sec. > yMODE SWITCH [MODE] (p. 23) > > .Push momentarily to cycle through the operating > modes: > USB/LSB . CW . RTTY/SSB-D . FM/AM > .Push for 1 sec. to toggle the following operating > modes: > USB . LSB > CW . Memory keyer mode > RTTY. SSB-D (SSB data mode) > FM . AM > uRECEIVE/TRANSMIT INDICATORS [RX]/[TX] > > .[RX]: Lights green while receiving a signal and > when squelch is open. > .[TX]: Lights red while transmitting. > iMAIN DIAL > Changes the displayed frequency, sets the values > of selected initial set mode items, etc. > > oUP/DOWN (BAND) SWITCHES [Y/Z(BAND)] > > .Push momentarily to select a band. > ?Can also be used to advance or back the quick set > mode items, initial set mode items, etc. > .Push and hold to scroll through the bands continuously. > !0MAIN DIAL TENSION LATCH > > Selects the main dial tension. > > ?2 positions are available. > !1MICROPHONE CONNECTOR (p. 10) > Modular-type microphone connector˜Accepts the > supplied microphone (HM-103). > > ?The optional OPC-589 can be used to connect an 8-pin > microphone such as the SM-8 or SM-20, if desired. > ?A microphone connector is also available on the rear > panel. DO NOT connect 2 microphones simultaneously. > !2LOCK SWITCH [LOCK] > > .Push momentarily to toggle the dial lock function > ON and OFF. > ?The dial lock function electronically locks the main > dial. > .When the optional UT-102 VOICE SYNTHESIZER > UNIT is installed (p. 86), push for 1 sec. to have > the frequency, etc. announced. > ?UT-102 operation can be adjusted in the initial set > mode (p. 82). > LOCK > Lights while the lock > function is activated. > !3DISPLAY SWITCH [DISPLAY] (p. 94) > > .Push momentarily to select one of the three menu > sets: M1 to M4, S1 to S4 and G1 to G4. > .Push for 1 sec. to enter the quick set mode. > !4MULTI-FUNCTION SWITCHES [F1] / [F2] / [F3] > > .Push to select the function indicated in the dot matrix display above these switches. (pgs. 4ˆ6, 94) > ?Functions vary depending on the menu set selected. > .Push to edit a character for memory keyer programming or memory name. (pgs. 35, 59) > !5MENU SWITCH [MENU] (p. 94) > > .Push this switch one or more times to select > menus within a menu set (M, S or G), or push to > advance through the quick set mode and initial > set mode displays. > .Push for 1 sec. to jump between two different > function menu sets. > 1 > > PANEL DESCRIPTION > > !6RIT/SUB DIAL SWITCH [RIT/SUB] (pgs. 21, 47) > > .Push to toggle the RIT or SUB DIAL function ON > and OFF˜initial set mode is used to select the > desired action*. > ?Lights green when the SUB DIAL function is ON; lights > red when the RIT function is ON. > ?Use the [M-CH] control to vary the RIT frequency or > SUB DIAL frequency (see below). > .When the RIT function is ON, push for 1 sec. to > add or subtract the shifted frequency to the operating frequency. > RIT/ > SUB > > Lights red while the RIT function is activated; > green while the SUB DIAL function is activated. > > *Even if RIT is selected in initial set mode, RIT cannot be selected when operating AM or FM modes. > > . What is the RIT function? > > The RIT (Receiver Incremental Tuning) shifts the receive frequency without shifting the transmit frequency. > > This is useful for fine tuning stations calling you on an off-frequency or when you prefer to listen to slightly different- > sounding voice characteristics, etc. > > !7SHIFT CONTROL [SHIFT] (outer control; p. 47) > Shifts the center frequency of the receiver‚s IF passband. > > ?Rotate the control clockwise to shift the center frequency > higher, or rotate the control counterclockwise to shift the > center frequency lower. > ?When rotate the control, the IF passband is graphically > displayed and changes in accordance with the [SHIFT] > control. > M-CH > SHIFT M-CH > SHIFT M-CH > SHIFT > Shifts low Center Shifts high > > !8M-CH CONTROL [M-CH] (inner control) > > .When the RIT or SUB DIAL functions are OFF, rotate to select a memory channel number (p. 56). > .Shifts the receive frequency while the RIT function is ON in SSB, CW and RTTY modes (see > above or p. 47). > ?RIT variable range is ± 9.99 kHz > .Changes the operating frequency in the selected > tuning steps while the SUB DIAL function is ON > (p. 21). > M-CH > SHIFT > Decreases > Increases > !9HEADPHONE JACK [PHONES] (p. 14) > Accepts headphones with 8ˆ16 O impedance. > > ?When headphones are connected, no receive audio > comes from the speaker. > ?When the PHONES/SPEAKER switch on the back of the > front panel is set to the [SPEAKER] position, an external > speaker can be connected. This is convenient for mobile > or outdoor operation. > Back of the front panel > > PHONES . > SPEAKER v PHONES . > SPEAKER v > @0TUNER SWITCH [TUNER] (pgs. 64ˆ66) > > .Push momentarily to toggle the automatic antenna tuner function ON and OFF (bypass). > ?Lights red when the automatic antenna function is ON. > .Push this switch for 1 sec. to manually tune the > antenna. > ?When the tuner cannot tune the antenna, the tuning > circuit is bypassed automatically after 20 sec. > TUNER > Lights while the automatic > tuning function is activated. > @1FRONT PANEL LATCH (p. 12) > Pull away from the transceiver (towards yourself > when looking at the front of the transceiver) to detach the front panel from the main body of the transceiver. > > @2PRE AMP/ATTENUATOR SWITCH [P.AMP/ATT] > > (p. 46) > .Push momentarily to turn the preamp ON or OFF. > .Push for 1 sec. to turn the 20 dB attenuator ON; > push momentarily to turn the attenuator OFF. > ?Lights green when the preamp is ON; lights red when the > 20 dB attenuator is ON. > P.AMP/ATT > Lights green while the preamp is activated; > lights red while the attenuator is activated. > . What is the preamp? > > The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn ON ŒP.AMP‚ > when receiving weak signals. > > . What is the attenuator? > > The attenuator prevents a desired signal from distorting > when very strong signals are near the desired frequency, or > when very strong electric fields, such as from a broadcasting station, are near your location. > > PANEL DESCRIPTION > > 1 > > Multi-function switches > DM1 functions DM2 functions > M1 SPL A/B XFC M2 MW MCL V/M > > MENU F-1 F-2 F-3MENU F-1 F-2 F-3 > SPLIT OPERATION (p. 30) > > .Push momentarily to toggle the split func-SPL > F-1 > tion ON and OFF. (p. 51) > ?„ä‰appears when the split function is ON. > .Push for 1 sec. to turn the quick split function ON. (p. 52) > ?The offset frequency must be programmed in > advance using initial set mode. (p. 80) > ?The offset frequency is shifted from the displayed frequency. > ?The quick split function can be turned OFF > using initial set mode. (p. 79) > VFO A/B SELECTION > > .Push momentarily to toggle VFO A and A/B > F-2 > VFO B in VFO mode. (p. 18) > .Push momentarily to toggle the transmission VFO and reception VFO during split > operation. (p. 51) > .Push momentarily to toggle the transmit > and receive frequencies (and modes) of > memory channels when the split function > is turned ON. > .Push for 1 sec. to equalize the frequency > and operatingmode of the two VFO‚s. > ?The rear (undisplayed) frequency and operating mode are equalized to the front (displayed) VFO frequency and operating mode. > TRANSMIT FREQUENCY CHECK (p. 51) > XFC Monitors the transmit frequency when > pushed and held. > > F-3 > ?While pushing this switch, the transmit frequency can be changed with the main dial. > MEMORY WRITE (p. 57) > Push for 1 sec. to store the selected read- > F-1 > MW out frequency and operating mode into > the displayed memory channel. > > MEMORY CLEAR (p. 58) > Push for 1 sec. to clear the selected read-MCL > F-2 > out memory channel contents. > > ?„}‰ appears. > ?This switch does not function in VFO mode. > VFO/MEMORY > > V/M .Push momentarily to toggle between VFO > and memory modes. (p. 56) > > F-3 > .Push for 1 sec. to transfer the frequency > and operating mode in the selected memory channel to a VFO. (p. 58) > DM3 functions > > M3 FIL NB MET > MENU F-1 F-2 F-3 > FILTER SELECTION (p. 49) > Push to toggle the narrow filter (or wideFIL > F-1 > filter˜push for 1 sec.) ON and OFF. > > ?„ã‰appears when the narrow filter is ON; > „ç‰ appears when the wide filter is ON. > ?An optional filter installation and presetting in > initial set mode (p. 79) is necessary to use > the following: > CW/RTTY narrow: FL-52A or FL-53A > SSB narrow: FL-222 > SSB wide: FL-257 > > NOISE BLANKER (p. 48) > > .Push momentarily to toggle the noise > F-2 > NB blanker ON and OFF. > ?„NB‰ appears when the noise blanker function is ON. > ?The noise blanker does not function in FM > mode; „30 AM NB‰ item (p. 80) in initial set > mode must be set to ON for the noise > blanker to work in AM mode. > .Push for 1 sec. to enter the noise blanker > level set mode. > ?The noise blanker level can be set in noise > blanker level set mode (p. 46). > 1 > > PANEL DESCRIPTION > > METER SELECTION (p. 52) > MET Selects the type of meter displayed (during transmit) in the function display. > > F-3 > ?Power, ALC or SWR metering can be selected. > ?Only an S-meter is available for receive. > DM4 functions > > DURING SSB/AM OPERATION: > > M4 VOX COM AGC > MENU F-1 F-2 F-3 > DURING CW OPERATION: > M4 1/4 KEY AGC > MENU F-1 F-2 F-3 > DURING RTTY OPERATION: > M4 1/4 TON AGC > MENU F-1 F-2 F-3 > DURING SSB-D OPERATION: > M4 1/4 AGC > MENU F-1 F-2 F-3 > DURING FM OPERATION: > M4 VOX TON > MENU F-1 F-2 F-3 > VOX FUNCTION (p. 53) > > .Push momentarily to toggle the VOX func- > F-1 > VOX tion ON and OFF. > ?„VOX‰ appears when the VOX function is > ON. > .Push for 1 sec. to enter the VOX set > mode. > ?The VOX delay, VOX gain and ANTI-VOX > can be set in VOX set mode. > . What is the VOX function? > > The VOX function (voice operated transmission) starts transmission without pushing the PTT switch when you speak into > the microphone; then, automatically returns to receive when > you stop speaking. > > SPEECH COMPRESSOR (p. 54) > COM .Push momentarily to toggle the speech > compressor ON and OFF. > > F-2 > ?„COM‰ appears when the speech compressor is ON. > .Push for 1 sec. to enter the compression > level set mode. > ?The COMP gain can be set in compression > level set mode. > AGC (p. 48) > AGC Push to change the time constant of the > AGC circuit. > > F-3 > ?„FAGC‰ appears when the fast time constant > is selected. > 1/4 FUNCTION > > Push to toggle the 1/4 tuning function ON1/4 > F-1 > and OFF. > > ?When the 1/4 function is ON, a bar appears > under the 1/4 indication and fine tuning can be > used. > KEYER SET MODE (p. 32) > Push for 1 sec. to enter the keyer setKEY > F-2 > mode. > > ?The break-in setting, break-in delay time, CW > pitch, CW paddle type and dot/dash ratio can > be set in the keyer set mode. > . What is the break-in function? > > Full break-in (QSK) activates the receiver between transmitted dots and dashes. This is useful when operating in nets, > or during DX pileups and during contests, when „fast exchanges‰ are common. > > RTTY TONE SET MODE (p. 40) > > .Push for 1 sec. to enter the RTTY tone set TON > F-2 > mode. > ?The RTTY tone frequency, RTTY shift frequency and RTTY keying polarity can be set > in RTTY tone set mode. > FM TONE OPERATION > > .Push momentarily to select the subaudi- > TON > F-2 > ble tone encoder for repeater use, tone > squelch function and OFF. (pgs. 43ˆ45) > > ?„T‰ appears when the repeater tone function > is ON. (pgs. 43, 45) > ?„TSQL‰ appears when the tone squelch function is ON. (p. 43) > .Push for 1 sec. to enter the FM tone set > mode. (p. 44) > ?The repeater tone frequency, tone squelch > frequency can be set in FM tone set mode. > > DS1 functions > > S1 MW MPW MPR > MENU F-1 F-2 F-3 > MEMORY WRITE (p. 57) > Push for 1 sec. to store the selected > F-1 > MW readout frequency and operating mode > into the displayed memory channel. > > MEMO PAD WRITE (p. 60) > MPW Push to store the the selected readout > frequency and operating mode into a > memo pad. > > F-2 > MEMO PAD READ (p. 60) > MPR Push to call up a memo pad. > > F-3 > DS2 functions > > DURING VFO MODE: > > S2 SCN PRI V/M > MENU F-1 F-2 F-3 > DURING MEMORY MODE: > S2 SCN SEL V/M > MENU F-1 F-2 F-3 > SCAN (pgs. 61ˆ63) > SCN Push to start or stop the scan function. > > F-1 > PRIORITY WATCH (p. 63) > PRI Push to start or stop the priority watch. > > F-2 > VFO/MEMORY > > .Push momentarily to toggle between VFOV/M > F-3 > and memory modes. (p. 56) > .Push for 1 sec. to transfer the frequency > and operating mode in the selected memory channel to a VFO. (p. 58) > SELECT SCAN (p. 61) > SEL Push to toggle the select setting ON and > OFF for the selected memory channel. > > F-2 > PANEL DESCRIPTION > > 1 > > DS3 functions > > S3 7 1421 > MENU F-1 F-2 F-3 > QUICK BAND CHANGE FUNCTION (p. 22) > This item provides access to the band stacking register. By default the 7, 14 and 21 MHz bands are displayed. Push [F-1], [F-2] or [F-3] for 1 sec. to > select a > new band if desired. > > ?A mode is memorized along with the frequency for each > band. > DS4 functions > > (UT-106 is required for some version) > > S4 ANF NR NRL > MENU F-1 F-2 F-3 > AUTOMATIC NOTCH FILTER (p. 50) > ANF This function automatically attenuates > beat tones, tuning signals, etc., even if > they are moving. > > F-1 > NOISE REDUCTION (p. 50) > This function reduces noise components > F-2 > NR and picks out desired signals which are > buried in the noise. > > NOISE REDUCTION LEVEL DISPLAY (p. 50) > This switch displays the noise reductionNRL > F-3 > level when pushed. > > 1 > > PANEL DESCRIPTION > > 0 > Rear panel > ert > > w > > q > > ! > > qANTENNA CONNECTOR [ANT] (p. 13) > Accepts a 50 O antenna with a PL-259 connector. > > wGROUND TERMINAL [GND] (p. 11) > Connect this terminal to a ground to prevent electrical shocks, TVI, BCI and other problems. > > eDATA SOCKET [DATA] (pgs. 8, 14) > 6-pin min DIN socket to connect a TNC (Terminal > Node Controller), etc. for packet operation. > > ?See page at right for socket information. > rACCESSORY SOCKET [ACC] (pgs. 8, 14) > Enables connection to external equipment such as a > TNC for data communications, a linear amplifier or > an automatic antenna selector/tuner, etc. > > ?See page at right for socket information. > tEXTERNAL SPEAKER JACK [EXT SP] (p. 14) > Accepts a 4ˆ8 O speaker. > > yCI-V REMOTE CONTROL JACK [REMOTE] (p. 71) > > .Designed for use with a personal computer for remote control of the transceiver functions. > .Used for transceiver operation with another Icom > CI-V transceiver or receiver. > uMICROPHONE CONNECTOR [MIC] (p. 13) > Accepts the supplied microphone (connected in parallel with the front panel‚s [MIC] connector). > > ?See p. 2 for microphone notes. > ?See p. 10 for microphone connector information. > yu i > > o > > iELECTRONIC KEYER JACK [KEY] (p. 28) > Accepts a paddle to activate the internal electronic > keyer. > > ?Selection between the internal electronic keyer and > straight key operation can be made in keyer set mode. > (p. 32) > When connecting > a straight key > (.) > When connecting > a paddle > (dot) > (com) > (dash) > If you use an external electronic keyer, make sure > the voltage retained by the keyer is less than 0.4 V > when the key is ON. > > oTUNER CONTROL SOCKET [TUNER] (p. 14) > Accepts the control cable from an optional AH-4 > HF/50 MHz AUTOMATIC ANTENNA TUNER. > > !0DC POWER SOCKET [DC13.8V] (p. 15) > Accepts 9.0ˆ15.87 V DC through the supplied DC > power cable. > NOTE: DO NOT use a cigarette lighter socket as a > power source when operating in a vehicle. The plug > may cause voltage drops and ignition noise may be > superimposed onto transmit or receive audio. > PANEL DESCRIPTION > > 1 > > DDATA socket > > DATA PIN No. NAME DESCRIPTION > 1 DATA IN Input terminal for data transmit. (1200 bps: AFSK/9600 bps: G3RUH, GMSK) > 2 GND Common ground for DATA IN, DATA OUT and AF OUT. > 34 > 56 > 3 PTT P PTT terminal for packet operation. Connect ground to transmit data. > 4 DATA OUT Data out terminal for 9600 bps operation only. > 12 5 AF OUT Data out terminal for 1200 bps operation only. > Rear panel view > 6 SQ > Squelch out terminal. Becomes ground level when the transceiver receives a signal > which opens the squelch. > ?To avoid unnecessary TNC transmission, connect squelch to the TNC to inhibit transmission when receiving signals. > ? Keep audio output at a normal level, otherwise a „SQ‰ signal will not be output. > > 1 > DACC socket > > ACC PIN No. NAME DESCRIPTION SPECIFICATIONS > 1 8 V Regulated 8 V output. Output voltage : 8 V ±0.3 V > Output current : Less than 10 mA > 2 GND Connects to ground. ˜˜˜ > 3 HSEND > Input/output pin. (HF/50 MHz only) > Goes to ground when transmitting. > When grounded, transmits. > Ground level : ˆ0.5 V to 0.8 V > Output current : Less than 20 mA > Input current (Tx) : Less than 200 mA > 1234 > 87 6 5 > 9101 12 > 13 > Rear panel view > 4 BDT Data line for the optional AT-180. ˜˜˜ > 5 BAND Band voltage output. > (Varies with amateur band) > Output voltage : 0 to 8.0 V > 6 ALC ALC voltage input. Control voltage : ˆ4 V to 0 V > Input impedance : More than 10 kO > q brown i gray > w red o white > e orange !0 black > r yellow !1 pink > t green !2 light > bluey blue > u purple !3 light > green > 7 NC ˜˜˜ ˜˜˜ > 8 13.8 V 13.8 V output when power is ON. Output current : Max. 1 A > 9 TKEY Key line for the optional AT-180. ˜˜˜ > 10 FSKK Controls RTTY keying > „High‰ level : More than 2.4 V > „Low‰ level : Less than 0.6 V > Output current : Less than 2 mA > 11 MOD Modulator input. > Connects to a modulator. > Input impedance : 10 kO > Input level : Approx. 100 mV rms > 12 AF > AF detector output. > Fixed, regardless of [AF] position in > default settings. > Output impedance : 4.7 kO > Output level : 100ˆ300 mV rms > 13 SQLS Squelch output. > Goes to ground when squelch opens. > SQL open : Less than 0.3 V/5 mA > SQL closed : More than 6.0 V/100 µA > > Color refers to the cable strands of the supplied cable. > > ? When connecting the ACC conversion cable (OPC-599) > q 8 V t ALC > w GND y VSEND > e HSEND u 13.8 V > r BAND > > ACC 1 ACC 2 q FSKK t AF > w GND y SQLS > e HSEND u 13.8 V > r MOD i ALC > 1234 > 8 > 8765 > 9101112 > 13 > 13 > 7 6 > 13 > 7 6 > 2 > 452 > 45 > Connect to ACC socket > > PANEL DESCRIPTION > > Function display > qw e > > N W > LSB USB CW R RTTY AM FM TSQL > > SPL > rb > > ra > > ! > > t > > 3 > NR > ANF > DSP > > !2 > > NB VOX F-BK COM FAGC > VFO A > VFO B > MEMO > BLANK > y > > u > > S13579 20 4060dB > > i > > S > > !1 > > ALC > > o > > CH > > SWRPO1 1.5 2 3 5 8 10 > > M1 SPL A/B XFC > !0 > > qNARROW/WIDE FILTER INDICATORS !0DOT MATRIX INDICATORS > > .„㉠appears when selecting AM narrow or FM These alphanumeric readouts show a variety of in- > narrow modes. formation such as current functions of the „F‰ keys > .When installing an optional narrow filter, narrow [F1] to [F3], memory channel names, set mode > mode can be selected in CW, RTTY and SSB items, etc. See p. 94 for an overview of these indimodes. cators. > ?When the SSB wide filter is installed, „ç‰ appears > !1METER READOUTS > > during wide mode selection. > > .Shows receiving signal strength while receiving. > wMODE INDICATORS .Shows one of transmit power meter, ALC or SWR > Show the selected operating mode. meter while transmitting. > > ?„å‰ appears when CW reverse or RTTY reverse mode is > selected. !2FUNCTION INDICATORS > .„NB‰ appears when the noise blanker is activated. > eSPLIT INDICATOR .„VOX‰ appears when the VOX function is se- > Appears during split operation. lected. > > .„F-BK‰ appears when full break-in operation is se > rPROGRAMMABLE/1 MHz TUNING STEP lected and only „BK‰ appears when semi break- > INDICATORS in operation is selected. > > .ra appears when the programmable tuning step .„COM‰ appears when the speech compressor isis selected. activated. > .rb appears when the 1 MHz quick tuning step is .„FAGC‰ appears when the fast AGC function is se- > selected. lected. > tFREQUENCY READOUT !3DSP INDICATORS > > Shows the operating frequency. Appear when the (optional*) DSP unit UT-106 is (installed and) activated. > > yBLANK MEMORY INDICATOR > > Appears when the displayed memory channel is not > > * UT-106 DSP unit is optional for some version. > programmed (blank channel). > > ?This indicator appears both in VFO and memory modes. > uVFO/MEMORY INDICATORS > > .VFO A or B appears when VFO mode is selected; > MEMO appears when memory mode is selected. > iSELECT MEMORY CHANNEL INDICATOR > > Appears when the selected memory channel is set > > as a select memory channel. > > oMEMORY CHANNEL READOUT > > Shows the selected memory channel. > PANEL DESCRIPTION > > 1 > > Microphone (HM-103) > q > > DN UP > LOCK > OFF ON > w > qUP/DOWN SWITCHES [UP]/[DN] > > Change the operating frequency. > > ?Push and hold to change the frequency continuously. > ?Tuning step is 50 Hz when no TS indicator appears. > e > wLOCK SWITCH [LOCK] > > Locks the [UP]/[DN] switches. > > ePTT SWITCH [PTT] > > Push and hold to transmit; release to receive. > > 1 > ?MICROPHONE CONNECTOR > TECHNICAL INFORMATION > PIN NO. FUNCTION DESCRIPTION > 1 +8 V DC output Max. 10 mA > 2 > Frequency up Ground > Frequency down Ground through 470 O > 8 > Squelch open „LOW‰ level > Squelch closed „HIGH‰ level > r PTT > y Microphone input > w Frequency up/down > u GND > q +8 V DC output > i Squelch switch > t GND (Microphone ground) > e AF output > Rear panel view > 12345678? HM-103 SCHEMATIC DIAGRAM > 4700p > 4700p10µ > 0.33µ + > + > MICROPHONE > MIC > ELEMENT > 2k > 2.2k > 470 > DOWNLOCK UP > PTT RECEIVE > TRANSMIT > MICROPHONE > CABLE > MICROPHONE PLUG > 12345678 > CAUTION:DO NOT short pin 1 to ground as > this can damage the internal 8 V regulator. > > 2 INSTALLATION AND CONNECTIONS > Unpacking > After unpacking, immediately report any damage to the > delivering carrier or dealer. Keep the shipping cartons. > > For a description and a diagram of accessory equipment included with the IC-703, see ŒSupplied accessories‚ on p. ii of this manual. > > Selecting a location > Select a location for the transceiver that allows adequate air circulation, free from extreme heat, cold, or > vibrations, and away from TV sets, TV antenna elements, radios and other electromagnetic sources. > > The base of the transceiver has an adjustable stand > for desktop use. Set the stand to one of two angles depending on your operating conditions. (see description > at right page) > > Grounding > To prevent electrical shock, television interference > (TVI), broadcast interference (BCI) and other problems, ground the transceiver through the GROUND > terminal on the rear panel. > > For best results, connect a heavy gauge wire or strap > to a long earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible. > RWARNING: NEVER connect the [GND] terminal to a gas or electric pipe, since the connection > could cause an explosion or electric shock. > Antenna connection > For radio communications, the antenna is of critical importance, along with output power and sensitivity. Select antenna(s), such as a well-matched 50 > O antenna, > and feedline. 1.5:1 or better of Voltage Standing Wave > Ratio (VSWR) is recommended for your desired band. > Of course, the transmission line should be a coaxial > cable. > CAUTION: Protect your transceiver from lightning > by using a lightning arrestor. > > ANTENNA SWR > Each antenna is tuned for a specified frequency > range and SWR may be increased out-of-range. > When the SWR is higher than approx. 2.0 : 1, the > transceiver‚s power drops to protect the final transis- > tors. In this case, an antenna tuner is useful to match > the transceiver and antenna. Low SWR allows full > power for transmitting even when using the antenna > tuner. The IC-703 has an SWR meter to monitor the > antenna SWR continuously. > 30 mm > 10 mm (soft solder) > 10 mm > 1ˆ2 mm > solder solder > Soft > solder > Coupling ring > PL-259 CONNECTOR INSTALLATION EXAMPLE > q > e > r > w > Slide the coupling ring > down. Strip the cable > jacket and soft solder. > Slide the connector > body on and solder it. > Screw the coupling > ring onto the connector > body. > Strip the cable as > shown at left. Soft > solder the center conductor. > > 2 > > INSTALLATION AND CONNECTIONS > > Installation > DSingle body mounting DStand > > To raise the stand: > > Spring washer > > NutWith the transceiver upside down, pull the stand to- > MB-62 > wards the rear panel and then upwards, as illus(optional) trated below. > > Supplied with > > the MB-62* > > Flat washer > > *CAUTION: Non-supplied screws (longer than 8 mm) > may damage the internal units. > Pull back > then up > DFront panel separation > > 2 > qWhile pulling the panel release button towards you, > slide the front panel to the right (fig. 1). > wAttach the optional OPC-581 to the main body and > tighten the supplied screw as in fig. 2. > eAttach the other end of the OPC-581 to the de- > tached front panel as in fig. 3. > CAUTION: NEVER detach/attach the front panel > when connecting the DC power supply (or battery). > Make sure the disconnecting DC power cable from > the [13.8 V] receptacle on the transceiver rear > panel. > fig. 1 fig. 2 fig. 3 > Latch Separation cable > Separation cable > DFront panel mounting > > qAttach the MB-63 to a flat surface using the two > supplied screws (fig. 1). > wFix the detached front panel to the MB-63 as illus- > trated in fig. 2. > BE CAREFUL of the orientation of the MB-63, oth- > erwise, the front panel may become attached in the > opposite direction. > fig. 1 > fig. 2 > > 13 > 2 INSTALLATION AND CONNECTIONS > Required connections > BAND > BAND > MODE > TS > DISPLAY > LOCK > F 1 F 2 F 3 > AF RF SQL > RIT > M-CH SHIFT > SUB > PHONES > TUNER > P.AMP ATT > Y > Z > POWER > MENU > TX > RX > MICROPHONE (p. 10) > HF/50 MHz ANTENNA > GROUND (p. 11) > HM-103 > CW KEY (p. 28) > Use the heaviest gauge wire or > strap available and make the > connection as short as possible. > Grounding prevents electrical > shocks, TVI and other problems. > Connects to DC 9.0ˆ15.8 V > power supply. See p. 15 for > details. > > 14 > INSTALLATION AND CONNECTIONS 2 > Advanced connections > BAND > BAND > MODE > TS > DISPLAY > LOCK > F 1 F 2 F 3 > AF RF SQL > RIT > M-CH SHIFT > SUB > PHONES > TUNER > P.AMP ATT > Y > Z > POWER > MENU > TX > RX > OPC-589 (p. 92) > DESKTOP (p. 91) > MICROPHONE > Selectable with the [PHONE/SPEAKER] switch > on the back of the front panel. > SPEAKER > ACC SOCKET (p. 8) > DATA SOCKET (p. 8) > 6-pin mini DIN socket to connect to a > TNC, etc. for packet operation. > AH-2b AH-4 (p. 16) > EXTERNAL > SPEAKER (p. 91) > HEADPHONES > SP-7/SP-10 > SM-20 > or > REMOTE (p. 71) > Used for computer control > and transceive operation. > 2 > > INSTALLATION AND CONNECTIONS > > DC Power voltage > Depending on the applied voltage from the connected > power supply, a boarder voltage of 11.0 V is set as the > point where the IC-703 switches between normal op- > erating mode (over 11.0 V), and battery operating > mode (under 11.0 V: power save mode). > However when the connected voltage decreases from > 13.8 V to 11.0V, the IC-703 switches from normal > mode to battery mode. Conversely the IC-703 > switches back to normal mode from battery mode > when the voltage reaches 11.5 V. This 0.5 V voltage > difference prevents irregular switching between nor- > mal mode and battery mode, caused by the voltage > drop which are current capacity, receiving or transmit- > ting. > When 11.3 V voltage is applied, the IC-703 may acti- > vate the battery operating mode depending on the > current capacity of the power supply. > DC Power supply connections > Use a 13.8 V DC power supply with at least 3 A ca- > pacity. when operating IC-703 with AC power. Refer > to the diagram below for connection. > CAUTION: > Before connecting the DC power cable, check the > following important items. Make sure: > ?The [POWER] switch is OFF. > ?Output voltage of the power source is 9.0ˆ15.8 V > when you use a non-Icom power supply. > ?DC power cable polarity is correct. > Red: positive (+) terminal, > Black: negative (ˆ) terminal > AC cable > AC > outlet > A DC power > supply* > *13.8 V; at least 3.0 A > continuous > Black > _ > Red > + > CONNECTING A DC POWER SUPPLYCONNECTING PS-125 DC POWER SUPPLY > PS-125 > DC power cable > Ground > 4 A fuses > Transceiver > to DC power > receptacle Supplied > OPC-1229 > Optional > OPC-1248 > Connect to an AC > outlet using the > supplied AC cable. > Battery connections > ?RWARNING NEVER connect to a battery > without supplied DC fuse, otherwise a fire hazard > occur. > ?NEVER connect the transceiver directly to a > 24 V battery. > ?DO NOT use the cigarette lighter socket for power > connections. (See p. 7 for details) > ?Attach a rubber grommet when passing the DC > power cable through a metal plate to prevent a > short circuit. > Grommet > CONNECTING A VEHICLE BATTERY > Note: Use terminals for > the cable connections. > Crimp > Solder > Supplied > DC power cable > redblack > 12 V > battery > > INSTALLATION AND CONNECTIONS > > 2 > > External antenna tuners and linear amplifier > GroundGround > Long wire or optional AH-2b > AH-4 > ANT > IC-703 > Coaxial cable > (from the AH-4) > CONNECTING THE AH-4 > IC-703 > Ground Ground > AT-180 > CONNECTING THE AT-180 > HF > to 6 m > antenna > [TRANSCEIVER] > [ANT] > [ANT] > [ACC] [ACC] > ACC cable supplied with the AT-180 > Coaxial cable supplied > with the AT-180 > one of two > connectors > Note: > Turn the IC-703‚s power OFF when connecting > the AT-180, otherwise, the CPU may malfunction > and the AT-180 may not function properly. > CONNECTING A NON-ICOM LINEAR AMPLIFIER > R WARNING: > ?Set the transceiver output power and linear ampli- > fier ALC output level referring to the linear amplifier > instruction manual. Be sure the linear amplifier key- > ing circuit control voltage is compatible with the IC- > 703, before connecting to HSEND line (ACC cable). > ?The ALC input level must be in the range 0 V to > ˆ4 V, and the transceiver does not accept positive > voltage. Non-matched ALC and RF power settings > could cause a fire or damage the linear amplifier. > ?The specifications for the SEND relay are 16 V > DC 0.5 A. If this level is exceeded, a large external > relay must be used. > HSEND > (Orange) > ALC (Blue) > 13.8V (Gray) > Ground > Relay > RF INRF OUT > ALC > SEND > ANT > ACC cable > ACC > IC-703 > 50 O coaxial cable To an > antenna > 2 > > 3 BASIC OPERATION > When first applying power (CPU resetting) > Before first applying power, make sure all connections > required for your system are complete by referring to > Chapter 2. Then, reset the transceiver using the following procedure. > Resetting CLEARS all programmed contents in > memory channels and returns all initial set mode and > quick set mode contents to their default values. > > qMake sure the transceiver power is OFF. > wWhile pushing [Y] and [Z], push [POWER] to turn > power ON. > > ?„CLEAR ? OK‰ appears as shown at right. > eThen push [F-3] for 1 sec to start resetting. > > ?The internal CPU is reset. > ?The display changes to ŒAll indication,‚ ŒRF power,‚ ŒPower > supply voltage‚ and ŒInitial frequency and Mode‚ as shown > at right. > DM1display selection > If you can‚t figure out how to return to the M1 display: > While pushing [MENU], turn power ON. > Initial settings > After resetting the transceiver, set controls and > switches as shown in the diagram below. > > [POWER]: OFF > [P.AMP/ATT]: OFF > (indicator lights out) > [TUNER]: OFF > (indicator lights out) > [RIT/SUB]: OFF > (indicator lights out) > [SHIFT]: Center > BAND > BAND > MODE > TS > DISPLAY > LOCK > F 1 F 2 F 3 > AF RF SQL > RIT > SHIFTM-CH > SUB > PHONES > TUNER > P.AMP ATT > Y > Z > POWER > MENU > TX > CCW : counterclockwise > RX > [AF]: Max. CCW > [RF/SQL]: Center > [LOCK]: OFF > (indicator light out) > Turn power ON, then check the display. If any of the > following indicators appear, turn them OFF as follows: > > ?Tuning step indicators, Z, (SSB, CW or RTTY): > Push [TS]. > ?MHz tuning step indicator, Z, (FM or AM): > Push [TS]. > ?1 Hz frequency readout (SSB, CW or RTTY): > Push and hold [TS]. > [POWER] > [Y] > [Z] > N W RLSB > NB VOX F-BK COM F > CH > VFO A > DUP > VFO B > MEMO > AGC > ALC > SWR PO > S1 > 11.5 2 3 5 > 53 7 9 20 40 > 10 > 60dB > USB CW RTTY AM WFM TSQL SPL > S > 8 > NR > ANF > BLANK > DSP > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > BLANK > M1 SPL A/B XFC > DC SUPPLY > RF POWER > CLEAR ? OK > F 3 > Push [F-3] > for 1 sec. > > The transceiver‚s > initial frequency and mode > > ?Memory mode indicator, MEMO: > Use [(F-3)V/M] in the M2 display (p. 75). > ?Split indicator, ä: > Use [(F-1)SPL] in the M1 display (p. 75). > > BASIC OPERATION > > 3 > > VFO description > VFO is an abbreviation of Variable Frequency Oscillator, and traditionally refers to an oscillator. The IC-703‚s > VFO can store a frequency and an operating mode. > > You can call up a desired frequency to a VFO with the > memo pad-read switch (p. 60) or with the memory > > CH > VFO A > USB > M1 SPL A/B XFC > VFO > MODE > SWITCH > MEMORY > CHANNELMEMO PAD > Select > 28.025 MHz 7.001 MHz > Transfer > Transfer > Change > > transfer switch (p. 58). You can also change the frequency with the main dial and select an operating > > DIAL > > mode with the [MODE] switch or call up previously ac- > > Transfer > > cessed frequency and modes with the band stacking > register (p. 22). > > BAND > > The IC-703 has two VFOs, specially suited for split fre > > 21.295 MHz > quency operation. The VFOs are called VFO A and > VFO B. You can use the desired VFO to call up a frequency and operating mode for operation. > > DThe differences between VFO and memory mode > > 3 > VFO MODE MEMORY MODE (pgs. 56ˆ60) > > Each VFO shows a frequency and operating mode. If Each memory channel shows a frequency and operthe frequency or operating mode is changed, the VFO ating > mode like a VFO. Even if the frequency or mode > automatically memorizes the new frequency or oper-is changed, the memory channel does not memorize > > ating mode. the new frequency or operating mode. > > When the VFO is selected from another VFO or When a memory channel is selected from another > memory mode, the last-used frequency and operat-memory channel or VFO mode, the memorized freing mode for that VFO appear. quency and operating mode appear. > > > [EXAMPLE] [EXAMPLE] > > VFO is selected. > > Memory channel 1 is > selected. > > USB USB > > VFO A > MEMO > > CH > CH > The frequency is changed. > > CH > USB > MEMO > MEMO > MEMO > CH > USB > CH > USB > The frequency is changed. > Memory mode is selected. > > Another memory channel > is selected. > VFO is selected again. > > Memory channel 1 is > selected again. > > Changed frequency (14.123 MHz) appears. Changed frequency (14.123 MHz) does not appear and > memorised frequency (14.100 MHz) appears instead. > > CH > VFO A > USB > MEMO > CH > VFO A > USB > CH > USB > > BASIC OPERATION > > Frequency setting > ?Band selection > All HF ham bands, the 50 MHz band and a general > coverage receiver band are included in the IC-703. > > Push [(Y)BAND]/[(Z)BAND] to select the desired > band. > > ?Pushing [(Y)BAND]/[(Z)BAND] continuously scrolls > through the available bands. > The band stacking register can also be used to se-LSB > lect bands. Refer to p. 22. > > USB > > FM > [Y] > [Z] > USB > USB > Z > Z > ?Programmable tuning steps > Programmable tuning steps are available to suit your > operating requirements. > These tuning steps are: > ?Independently selectable for each mode > ?Selectable from 0.01 (FM/AM only), 0.1, 1, 5, 9, 10, > 12.5, 20, 25 and 100 kHz > qPush [TS] one or more times until the programmable tuning step indicator „Z‰ appears above the 1 > kHz digit. > > Programmable tuning > > ?Rotating the main dial changes the frequency according > step indicator > > to the set tuning step. > > wPush [TS] for 1 sec. while the programmable tuning > step indicator appears to enter the tuning step selection mode. > > ?„Rotate DIAL‰ appears. > 10 kHz tuning step is > > eRotate the main dial to set the desired tuning step. > > selected for USB > > ?Change the mode and select tuning steps for other > operation. > > modes, if desired. > > rPush [TS] to exit the tuning step selection mode. > > tRotate the main dial to change the frequency according to the set tuning step. > > [TS] Main dial > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > USB > M1 A/B XFC > DIAL > SPL > Rotate > > BASIC OPERATION > > 3 > > ?1 Hz and 10 Hz tuning steps > When neither the quick tuning step or programmable > tuning step „Z‰ appear, rotating the main dial > changes the frequency in increments of 1 or 10 Hz. > > These tuning steps are only available in SSB, CW > and RTTY modes. > > qSelect SSB, CW or RTTY mode if necessary. > wPush [TS] for 1 sec. to toggle between the 1 Hz > and 10 Hz step settings. > > [TS] Main dial > > ?When the 1 Hz step is selected, the 1 Hz digit appears > in the frequency indication; when the 10 Hz step is se- > Rotating the main dial > > lected, the 1 Hz digit disappears from the frequency in- > > changes the frequency > > dication. > > in 10 Hz steps. > > ?Rotating the main dial changes the frequency 1 Hz or > 10Hz tuning step. > [MODE] > VFO A > USB > TSPush for 1 sec. > VFO A > USB > Rotating the main dial > changes the frequency > > 3 > in 1 Hz steps. > > ?1 MHz quick tuning step > The quick tuning step function allows you to change [MODE] > > the frequency in 1 MHz steps when rotating the main > dial. This function is only available in FM and AM > modes. > > qSelect FM or AM mode if necessary. > > wPush [TS] momentarily to toggle between the 1 > MHz tuning step and the programmable tuning > step. > > ?„Z‰ appears above the 1 MHz indicator when the 1 > MHz tuning step is selected. Quick tuning step > ?Rotating the main dial changes the frequency 1 MHz or indicator > set tuning step. > FM > > [TS] Main dial > FM > Rotating the main dial > changes the frequency > in 1 MHz steps. > BASIC OPERATION > > ? [TS] switch flow chart > SSB/CW/RTTY modes Any mode FM/AM modes > TSUSB > 10 Hz tuning > TS > 1 MHz tuning > USB > Programmable step tuning > FM > AppearsAppears > momentarily (100 Hz ˆ100 kHz) momentarily > > 1 sec.1 sec. > TSTS > 1 sec. momentarily > > USB > 1 Hz tuning > USB > Rotate DIALAppears > Selectable for each mode. > > ?Sub dial function > The sub dial function allows you to change the operating frequency using the [M-CH] control. This gives > you more control in tuning since the [M-CH] knob is > detented˜each click changes the frequency according to the set tuning step. This function is always > available in FM and AM modes. However, in SSB, > CW and RTTY modes, the initial set mode item „21 > SUB DIAL‰ (p.61), must be set to „FrEq.‰ > > qPush [RIT/SUB] to turn the sub dial function ON. > > ?The [SUB] indicator lights green; if it lights red, the RIT > function is activated˜sub dial function must be set in > initial set mode in this case. > wRotate [M-CH] to change the operating frequency > according to the set tuning step. > ePush [RIT/SUB] again to turn the function OFF. > ?The [SUB] indicator turns off. [M-CH] [RIT/SUB] > RIT/ > > Indicator lights green > > SUB > > while the sub dial > function is activated. > > BASIC OPERATION > > 3 > > ?Quick band change function > The quick band change function automatically stores > the last frequency and mode used for each band in a > band stacking register. This is convenient for contest > operation, etc. The tables below show the quick band > change default settings for each band. > > qSelect S3. > > ?Push [DISPLAY] once or twice to select S. > ?Push [MENU] one or more times to select S3. > wPush [F-1], [F-2] or [F-3] to select a band stacking > register. > > ?The default settings for [F-1], [F-2], [F-3] are 7, 14, 21 > MHz bands, respectively. > eTo change the settings for [F-1], [F-2] or [F-3] from > their defaults, push [F-1], [F-2] or [F-3] for 1 sec. > one or more times to until the desired band appears in the display above the corresponding > switch. > > ?The last-used frequency and mode for the selected > band are displayed. > BAND FREQUENCY MODE > 1.9 MHz 1.90000 MHz*1 CW > 3.5 MHz 3.55000 MHz LSB > 7 MHz 7.05000 MHz LSB > 10 MHz 10.12000 MHz CW > 14 MHz 14.10000 MHz USB > 18 MHz 18.10000 MHz USB > 21 MHz 21.20000 MHz USB > 24 MHz 24.95000 MHz USB > 28 MHz 28.50000 MHz USB > 50 MHz*2 50.10000 MHz USB > General*3 15.00000 MHz USB > > *1 1.83000 MHz for Italy version (#10, #20). > > *2 50 MHz band is not available for some version. > > *3 General refers to the general coverage receiver (GEN in > the display) and the range varies according to version. > > [DISPLAY][F-2][MENU] > [F-3][F-1] > BLANK > CH > VFO AS1 53 7 9 20 40 60dB > USB > S3 7 14 21 > PO 5 10 > Display shows the > default bands for the > quick band change > function. > BLANK > CH > VFO AS1 53 7 9 20 40 60dB > USB > S3 7 GEN 21 > PO 5 10 > Display shows [F-2] > has been changed > from its default of the > 14 MHz band to the > general receiver band. > 3 > > BASIC OPERATION > > Operating mode selection > The following modes are available in the IC-703: > SSB (LSB/USB), CW, CW-å (CW reverse), RTTY > and åRTTY (RTTY reverse), FM, AM. > ?SSB (LSB/USB), CW, RTTY, SSB-D, FM and > AM modes selection > To select the desired mode of operation, push > [MODE] one or more times, then push [MODE] for 1 > sec., if necessary. See the diagram at right for the > order of selection. > ? The selected mode is indicated in the function display. > ?CW-å (CW reverse) mode selection > qWhen selecting CW mode, push [DISPLAY] for 1 > sec. to enter quick set mode. > wPush [MENU] one or more times to select item „Q3 > CW REV‰ during CW mode. > ?[Y]/[Z] or [M-CH] can also be used. > eRotate the main dial to select CW reverse. > rPush [DISPLAY] to exit quick set mode. > ?„CW-å‰ appears. > ?åRTTY (RTTY reverse) mode selection > qWhen selecting RTTY mode, push [DISPLAY] for 1 > sec. to enter quick set mode. > wPush [MENU] one or more times to select item „Q2 > RTTY REV‰ during RTTY mode. > ?[Y]/[Z] or [M-CH] can also be used. > eRotate the main dial to select RTTY reverse. > rPush [DISPLAY] to exit quick set mode. > ?„åRTTY‰ appears. > Note:If a desired mode cannot be selected, it may be > hidden using initial set mode (p. 76). [DISPLAY] > [MODE] > [MENU][M-CH] > [Y] > [Z] > OPERATING MODE SELECTION > MODE > Push > momentarily > Memory keyer > set mode > MODE > Push > for 1 sec. > USB LSB > FM AM > SSB-D > CW > RTTY > [MODE] > Volume setting > Rotate [AF] control to output a suitable audio level. [AF] > > AF > RF/SQL > Decreases > > Increases > No audio output Max. audio output > > BASIC OPERATION > > 3 > > Squelch and receive (RF) sensitivity > Adjusts the RF gain and squelch threshold level. The > squelch removes noise output from the speaker > (closed position) when no signal is received. > > ?The squelch is particularly effective for FM mode. It is also > available for other modes. > ?The control can be set as the RF gain control only > (squelch is fixed open) or squelch control (RF gain is fixed > at maximum) in initial set mode (p. 79). See below right. > ?The 11 to 12 o‚clock position is recommended for any setting of the [RF/SQL] control. > ?When setting as RF gain/squelch control > SET MODE > OPERATION > RF+SQL > (default) > Can be used in all modes. > Functions as noise squelch or S-meter > squelch in AM and FM modes; S- > meter squelch only in other modes. > SQL > Operates as a squelch control. > ?RF gain is fixed at maximum sensitivity. > AUTO > Operates as an RF gain control in > SSB, CW and RTTY modes. > ?Squelch is fixed open. > Operates as a squelch control in AM > and FM modes. > ?RF gain is fixed at maximum sensitivity. > Squelch is > open. > RF gain > adjustable > range > > ?When functioning as RF gain control (Squelch is > fixed open; SSB, CW, RTTY only) > Adjusting RF gain (Receive sensitivity) > Normally, [RF/SQL] is set to the 11 o‚clock position. > Rotate [RF/SQL] to the 11 o‚clock position for maxi-Adjustable > range > > mum sensitivity. > > ?Rotating counterclockwise from the maximum position reduces sensitivity. Minimum RF gain > ?The S-meter indicates receive sensitivity. > ?When functioning as squelch control (RF gain is > fixed at maximum) > Noise squelch (FM mode) > Adjusting squelch (Removing non-signal noise) Noise squelch > Shallow Deep > > threshold > > S-meter squelch > threshold > > Rotate [RF/SQL] clockwise when receiving no signal, (FM mode) > > until the noise just disappears. > > ?[RX] indicator light goes out. > ?Rotating [RF/SQL] past the threshold point invokes the S-Squelch is S-meter > squelch > > meter squelch˜ this allows you to set a minimum signal open. > level needed to open the squelch. > [RF/SQL] > Recommended level > Maximum > RF gain > S-meter > squelch > Noise squelch (FM mode) > 3 > Maximum > RF gain > > BASIC OPERATION > > Dial lock function > The dial lock function prevents accidental changes > caused by the tuning dial. > > . Push [LOCK] to turn the dial lock function ON and > OFF. > ?„LOCK‰ indicator lights while the dial lock function is > activated. > Lights while the dial lock function is activated. > [LOCK] > Basic transmit operation > DTransmitting > Before transmitting, monitor your selected operating > frequency to make sure transmitting > won‚t cause interference to other stations on > the same frequency. It‚s good Amateur practice > to listen first, and then, even if nothing is heard, > ask „is the frequency in use‰ once or twice, before > you begin operating on that frequency. > > [PTT] > > q Push [PTT] (microphone) to transmit. > > ?The [TX] indicator lights red. > w Release [PTT] (microphone) to return to receive. > HM-103 > DMaximum output power > > qPush [POWER] for 1 sec. to turn power OFF. [POWER] > wWhile pushing [LOCK], push [POWER] to turn > > [Y] > power ON and enter initial set mode. > ePush [MENU] one or more times to select „1 MAX > POWSET,‰ if necessary. > > ?[M-CH] or [Y]/[Z] can also be used. > rRotate the main dial to select the desired maximum > [Z] > output power. > > ?Maximum output power is selectable „0.5,‰ „1,‰ „2.5,‰ „5‰ > or „10.‰ > ?Default setting is „10.‰ > tPush [POWER] to turn power OFF, and ON again. > [M-CH] [LOCK][MENU] > 25 > 1 MAX POWSET > > BASIC OPERATION > > 3 > > DSetting output power QUICK SET MODE > > qPush [DISPLAY] for 1 sec. to select quick set mode. > > wPush [MENU] one or more times to select „Q1 RF > POWER.‰ > > eRotate the main dial to select the desired output. > > ?Output power is displayed in 11 steps (L, 1ˆ9 and H) > but is continuously selectable. > rPush [DISPLAY] to exit quick set mode. > > ?Available power > Power supply > voltage > SSB/CW > RTTY/FM > AM* > 13.8 V > (DC power mode) > 0.1ˆ10 W 0.1ˆ4 W > 9.6 V > (Battery mode) > 0.1ˆ5 W 0.1ˆ2 W > > [MENU] [DISPLAY] > > Maximum output > power is selected. > > *Carrier power > > Main dial > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > Q1 RF POWER > 3 > DSetting microphone gain QUICK SET MODE > > Microphone gain must be adjusted properly so that Main dial > your signal does not distort when transmitted. > > qSelect SSB or another phone mode (AM or FM > > mode). > wPush [DISPLAY] for 1 sec. to select quick set mode. > ePush [MENU] one or more times to select „Q2 > > MIC GAIN.‰ > > ?The ALC meter is selected automatically when operat > ing in SSB mode. [MENU] [DISPLAY] > rWhile speaking into the microphone adjust the microphone gain so that the ALC meter does not > > ALC > S1 53 7 9 20 40 60dB > USB > Q2 MIC GAIN > Microphone gain > > peak past the ALC zone. > > is set to 5. > > tPush [DISPLAY] to exit quick set mode. > ALC > ALC zone > 4 RECEIVE AND TRANSMIT > Operating SSB > q Push [(Y)BAND]/[(Z)BAND] to select the desired > band. > > w Push [MODE] momentarily or push for 1 sec. to select LSB or USB mode. > > ?Below 10 MHz LSB is automatically selected; above > 10 MHz USB is automatically selected. > e Rotate [AF] control to set audio to a comfortable lis > tening level. > r Rotate the main dial to tune a desired signal. > > ?S-meter indicates received signal strength. > t Push [PTT] (microphone) to transmit. > ?The TX indicator lights red. > y Speak into the microphone at your normal voice > level. > > ?Adjust ŒMIC GAIN‚ at this step, if necessary. (p. 26) > u Release [PTT] (microphone) to return to receive. > D Convenient functions for receive > > [AF] [TX] indicator [MODE] > > Main dial„LSB‰ or „USB‰ appears > [Y] > [Z] > LSB > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > USB > M1 SPL A/B XFC > ?Preamp and attenuator (p. 46) ?AGC (auto gain control) (p. 48) > . Push [P.AMP/ATT] momentarily to set the preamp . While „M4‰ is selected, push [(F-3)AGC] to select > ON or OFF. AGC fast and AGC slow. > ?Lights green when the preamp is set to ON. ?Push [DISPLAY] once or twice to select M. > . Push [P.AMP/ATT] for 1 sec. to set the attenuator ?Push [MENU] one or more times to select M4. > ON. ?„FAGC‰ appears when the fast time constant is se > ?Push [P.AMP/ATT] momentarily to turn the attenua-lected. > tor OFF. > ?Lights red when the attenuator is set to ON. ?Noise reduction (p. 50) > . While „S4‰ is selected, push [(F-2)NR] to turn the > ?Noise blanker (p. 48) noise reduction ON and OFF. > . While „M3‰ is selected, push [(F-2)NB] to turn the ?Push [DISPLAY] once or twice to select S. > noise blanker ON and OFF. ?Push [MENU] one or more times to select S4. > ?Push [DISPLAY] once or twice to select M. ? Push [(F-3)NRL] then rotate [M-CH] to adjust the > ?Push [MENU] one or more times to select M3. noise reduction level. > ?„NB‰ appears when the noise blanker is set to ON. ?„NR‰ appears when the noise reduction is set to ON. > ?Push [(F-2)NB] for 1 sec. to enter the noise blanker > set mode. ?Auto notch filter (p. 50) > > . While „S4‰ is selected, push [(F-1)ANF] to turn the > ?IF shift (p. 47) auto notch filter function ON and OFF. > . Rotate [SHIFT] control. ?„ANF‰ appears when the noise reduction is set to > ON. > D Convenient functions for transmit > > ?Speech compressor (p. 54) ?Carrier frequency control (p. 75) > . While „M4‰ is selected, push [(F-2)COM] to turn . While „Q3‰ is selected, rotate main dial to adjust > the speech compressor ON and OFF. the audio tone. > ?Push [DISPLAY] once or twice to select M. ?Push [DISPLAY] for 1 sec. to enter the quick set > ?Push [MENU] one or more times to select M4. mode. > ?„COM‰ appears when the speech compressor is set ?Push [MENU] one or more times to select Q3. > to ON. > ?Push [(F-2)COM] for 1 sec. to enter the compression ?VOX (voice operated transmit) (p. 53) > level set mode. . While „M4‰ is selected, push [(F-1)VOX] to turn > the VOX function ON and OFF. > > ?Push [DISPLAY] once or twice to select M. > ?Push [MENU] one or more times to select M4. > ?„VOX‰ appears when the VOX function is set to ON. > ?Push [(F-1)VOX] for 1 sec. to enter the VOX set mode. > > RECEIVE AND TRANSMIT > > 4 > > Operating CW > DConnections for CW > > Rear panel > CW > K4 CW PADDLE > K4 CW PADDLE > K4 CW PADDLE > K4 CW PADDLE > K4 CW PADDLE > CW > CW > CW > CW > Paddle > [KEY] > [MICROPHONE] > Straight key > Microphone > Keyer set mode settingRear panel4 > 8 > 12 > [ACC] > 123 > 76 5 > 9101113 > For no break-in operation: > Connect an external switch > such as a foot switch; or use > the RTTY SEND terminal for > all bands. (See p. 38) > See p. 31 for connection details: > Paddle operation from front panel > MIC connector. > Normal > Reverse > Bug > 4 > > RECEIVE AND TRANSMIT > > DCW operation > > qConnect a paddle or straight key as at previous > page. > wPush [(Y)BAND]/[(Z)BAND] to select the desired > band. > ePush [MODE] momentarily to select CW mode. > ?After CW mode is selected, push [MODE] for 1 sec. to > toggle between CW and Memory keyer modes. > rWhile the quick set mode item „Q3‰ is selected in > CW mode, rotate main dial to select CW or CWå > mode. > ?Push [DISPLAY] for 1 sec. to enter the quick set mode. > ?Push [MENU] one or more times to select Q3. > ?Push [DISPLAY] momentarily to return to normal oper- > ating mode. > t Rotate [AF] control to set audio to a comfortable > listening level. > y Rotate the main dial to simultaneously tune a de- > sired signal and its side tone. > uSet CW setting in the keyer set mode. > ?Push [DISPLAY] once or twice to select M. > ?Push [MENU] one or more times to select M4. > ?Push [(F-2)KEY] for 1 sec. to enter the keyer set mode. > (p. 32) > iSet CW break-in operation as semi break-in, full > break-in or OFF. > ?Push [MENU] one or more times to select „K1 BK- > IN.‰ > ?Rotate the main dial to select CW break-in operation. > .FULL: full break-in > .on : semi break-in > .OFF : no break-in (ACC socket connection is neces- > sary as at previous page.) > oSet the CW delay time when semi break-in opera- > tion is selected. > ?Push [MENU] one or more times to select „K2 BK- > IN DELAY.‰ > ?Rotate the main dial to set the desired delay time (see > p. 32 for details). > !0 Keying to transmit, use the electric keyer or pad- > dle to key your CW signals. > ?The TX indicator lights red. > ?The Po meter indicates transmitted CW signal > strength. > !1 Release keying to return to receive. > BK > VFO A > CW > CW > K2 BK-IN DELAY > M4 KEY1/4 AGC > Delay time of 6.0 > dots is selected > for semi break-in > operation. > CHPO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > CW > K1 BK-IN > Semi break-in > operation is > selected. > Appears > R > CH > VFO A > PO > S1 > 5 > 53 7 9 20 40 > 10 > 60dB > CW > M4 1/4 KEY AGC > F 2 > [TX] indicator [MODE] Main dial > [DISPLAY][F-2][MENU] > [AF] > [Y] > [Z] > „CW‰ or „CWå‰ appears > > RECEIVE AND TRANSMIT > > 4 > > D Convenient functions for receive > > ?Preamp and attenuator (p. 46) ?IF shift (p. 47) > . Push [P.AMP/ATT] momentarily to set the preamp . Rotate [SHIFT] control. > ON or OFF. > ?Lights green when the preamp is set to ON. ?Noise reduction (p. 50) > . Push [P.AMP/ATT] for 1 sec. to set the attenuator . While „S4‰ is selected, push [(F-2)NR] to turn the > ON. noise reduction ON and OFF. > ?Push [P.AMP/ATT] momentarily to turn the attenua-?Push [DISPLAY] once or twice to select S. > tor OFF. ?Push [MENU] one or more times to select S4. > ?Lights red when the attenuator is set to ON. ?Push [(F-3)NRL] then rotate [M-CH] to adjust the > noise reduction level. > ?Noise blanker (p. 48) ?„NR‰ appears when the noise reduction is set to ON. > . While „M3‰ is selected, push [(F-2)NB] to turn the > noise blanker ON and OFF. ?Auto notch filter (p. 50) > > ?Push [DISPLAY] once or twice to select M. . While „S4‰ is selected, push [(F-1)ANF] to turn the > ?Push [MENU] one or more times to select M3. auto notch filter function ON and OFF. > ?„NB‰ appears when the noise blanker is set to ON. ?„ANF‰ appears when the noise reduction is set to > ?Push [(F-2)NB] for 1 sec. to enter the noise blanker ON. > set mode. > ?1/4 function > ?AGC (auto gain control) (p. 48) . While „M4‰ is selected, push [(F-1)1/4] to turn > . While „M4‰ is selected, push [(F-3)AGC] to select the 1/4 function ON and OFF. > AGC fast and AGC slow. ?Push [DISPLAY] once or twice to select M. > ?Push [DISPLAY] once or twice to select M. ?Push [MENU] one or more times to select M4. > ?Push [MENU] one or more times to select M4. > ?„FAGC‰ appears when the fast time constant is selected. > 4 > D Convenient functions for transmit > > ?Break-in function (p. 32) > . While „M4‰ is selected, push [(F-2)KEY] for 1 sec. > to enter the keyer set mode. > ?Push [DISPLAY] once or twice to select M. > ?Push [MENU] one or more times to select M4. > . Rotate the main dial to select the break-in OFF, > semi break-in or full break-in. > ?„BK‰ or „F-BK‰ appears when the semi break-in or full > break-in is set to ON, respectively. > DCW reverse mode QUICK SET MODE > > The CWå (CW Reverse) mode receives CW signals > with a reverse side CW carrier point like that of LSB > and USB modes. Use this mode when interference > signals are near the desired signal and you want to > change the interference tone. > > qSelect CW mode with [MODE]. > > [MODE] Main dial > [DISPLAY][MENU] > wPush [DISPLAY] for 1 sec. to enter quick set mode. > ePush [MENU] one or more times to select „Q3 CW > > ? Receive audio tone response > REV,‰ then rotate the main dial to select CW and > > (Normal) CW (Reverse) CWå > > CWå modes. > > ?Check the interference tone. 600 Hz > rPush [DISPLAY] momentarily to exit quick set mode. > 600 Hz > inteference BFO inteference signal > signal BFO > RECEIVE AND TRANSMIT > > DCW pitch control > > The received CW audio pitch and monitored CW > audio pitch can be adjusted to suit your preferences > (300 to 900 Hz) without changing the oper   ================================================================================ **Disclaimer:** This guide is volunteer-submitted and provided "as is" without warranty. Use caution and verify all information before proceeding. "I Can Work This Thing" assumes no responsibility for accuracy, safety, or any damage/injury resulting from use. For complex or dangerous procedures, consult qualified professionals. 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